The Mercury source code is hosted at GitHub. You can check out the latest copy of the source code using a git client, for example using this command:
git clone https://github.com/Mercury-Language/mercury.git
vim directory of any release package.
Discussion about Mercury happens on the mailing lists. You can find them on the Contact page.
Bugs may be reported on our bug tracker, on our GitHub issues page or on the mercury-users mailing list.